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JEE Main 2021 (31 Aug, Shift 1) · Matter Waves: de Broglie Wavelength

Matter Waves: de Broglie Wavelength question from JEE Main 2021 (31 Aug, Shift 1)

Q92JEE Main 2021 · 31 AUG · SHIFT 1Easy

Matter Waves: de Broglie Wavelength

A moving proton and electron have the same de-Broglie wavelength. If K and P denote the K.E. and momentum respectively. Then choose the correct option:

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Answer: (a)

Same $\lambda = \dfrac{h}{P}$ gives $P_p = P_e$ .
$K = \dfrac{P^2}{2m}$ and $m_p > m_e$ , so $K_p < K_e$ .
So the answer is (a) $K_p < K_e$ and $P_p = P_e$ .

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